Oregon voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, businessman Donald Trump, and running mate Indiana Governor Mike Pence against Democratic Party nominee, former Secretary of State Hillary Clinton, and her running mate Virginia Senator Tim Kaine.

[5] Six candidates appeared on the Republican presidential primary ballot: The 28 delegates from Oregon were allocated proportionally based on the statewide popular vote.

The party's ballot included Bernie Sanders (D), Hillary Clinton (D), Donald Trump (R), Ted Cruz (R), John Kasich (R), Gary Johnson (L), Jill Stein (G) and a "none of these candidates" choice.

[12] Bernie Sanders won the primary election with 31.5% of the vote, narrowly defeating Donald Trump's 30.08%.

[13] Besides Lyndon Johnson's landslide victory in 1964, the Republican party's candidate won Oregon in every year from 1948 through 1984.

[22] Hillary Clinton carried the state, lengthening the Democratic streak in Oregon to 8 straight contests.